Cold producing plant



Feb. 27, 1940. I R, mNTzE 2,191,659

COLD PRODUCING PLANT Filed June 2, 1937 2 Sheecs-Sheet 1 ya 4 W 5 Feb. 27, 1940. R. HINTZE 2,191,659

' com) PRODUCING PLANT Filed June 2, 1937 2 Sheets-Sheet 2 Patented Feb. 27, 1940 UNITED STATES PATENT OFFI CE' 2,191,659 com PRODUCING PLANT Rudolf Hlntze, Berlin-Charlottenburg, Germany,

assignor to Slemens-Schuckertwerke Aktiengesellschaft, Berlin-Slemensstadt, Germany, a corporation of Germany Application June 2, 1931, Serial No. 145,962 In Germany June 3, 1938 3 Claims.

parts of the plant.

The invention relates in particular to cold producing plants of the last-named kind and refers to an improvement of such plants, the invention consisting in the use of a regulating element, which permits of changing at will the air'current in the cooling room produced by the fan. For driving the fan, circulating the cooling room air, preferably a motor arranged outside the insulated cooling room is used, and according to the invention the shaft of such motor passes through the cooling room insulation. In that case 1 the driving motor of the fan circulating the cooling room air may be used to also drive a second fan cooling the heat-emanating parts of the refrigerating machine. This will permit of obtaining at the same time thorough cooling of the heat-emanating parts of the refrigerating machine, for instance, the condenser and the compressor, andgood and adjustable distribution of the cooling effect in the cooling room. My invention is illustrated in the accompany ing drawings, in which Figure 1 shows in sectional elevation a compression refrigerating machine in which is used a common driving motor for a fan for cooling the heat-emanating parts of the refrigerating machine and a second fan for circulating the cooling room air.

Figure 2 shows in similar view another mode of construction in which the fan circulating the cooling room air, together with the evaporator of the refrigerating machine and an ice tray is installed in a special compartment of the cooling room.

Figure 3 shows a sectional side elevation of the special cooling room compartmentof Figure 2, a drawer carrying an ice tray being removed, and

Figure 4 shows in sectional elevation a further mode of construction of the invention, in which the compression driving motor itself is driving the fan for circulating the cooling room air.

,air.

In Figure 1 the evaporator of the refrigeratingmachine is denoted by I. The refrigerating medium is withdrawn from the evaporator through a pipe 2 connected -to the compressor 3, mounted on top of the refrigerator. The com- 5 pressed refrigerating medium enters an air-cooled condenser 4 and from there passes into a container 5, in which is installed a regulating element, regulating the quantity of the liquefied refrigerating medium flowing to the evaporator through the pipe 6. On 'top of the refrigerator is mounted the driving motor I of the fan 8. This fan impels a current of cooling air over the condenser 4 of the refrigerating machine.

The cooling air is drawn-in through the inlet openings I8 arranged at the. side of the hood [6 and after having absorbed the waste heatof the refrigerating machine escapes through the openings l'l.

The shaft in of the motor 1 extends also from the other side of the motor and passes through the upper wall of the refrigerator. It carries a fan 9 serving for circulating the cooling room The fan 9 is arranged in a compartment ll separated by a hood l3 from the actual cooling room l2. The hood is provided at the upper portions with inlet openings M for the cooling room air and at the lower portion with outlet openings for the air moved by the fan. The lower outlet openings may be closed more or less by hand by means of a slide l5 as shown in the figure. This permits of regulating the movement of the air circulated by the fan 9. The ice tray, arranged in the evaporator of the refrigerating machine, is denoted by 20.

Figure 2 shows by way of example another mode of construction of the invention. As far as the individual parts of this modification correspond to those of Figure 1, the same symbols have been employed. In the present case the evaporator I of the refrigerating machine and the fan 9, serving for circulating the cooling room air,- are installed in a compartment ll divided from the cooling room by the hood l3. The evaporator consists of pipes and cooling ribs 24. The compartment II is provided below the evaporator l with a space for accommodating an ice tray 20. The lower opening of the compartment II is closed, when inserting the ice tray, by a slide l9, rigidly connected to the ice tray 2ll,'so that after having inserted the tray, the air cannot be blown into the cooling room by the fan 9.

Figure 3 is a side view of the compartment H, shown in section. The drawer carrying the of the pipe 82.

ice tray has been pulled-out of the compartment. The tray 20 is rigidly connected by feet with the drawer IS, the front part of which is designed as handle 2!. The arrangement shown of the ice tray provided with feet results in the special advantage that when producing ice, the air in the compartment II can reach the ice drawer also from below. For normal cooling the ice drawer is removed from the compartment If, so that the cooling room air is blown downwards from above over the evaporator by means of the fan 9, as shown in Figure 3, whereby the cooling room air enters the compartment H by the inlet opening at and leaves it through the lower opening 22. I

While in the examples disclosed in Figures 1 and 2 the compressor driving motor is constructionally combined'with the compressor, Figure 4 shows an embodiment of the invention ins-whichthe driving motor' -irseparated from the compressor. The refrigerating medium passes from the compressor 3! to the condenser 33 by means The condensate flows through the pipe 3% over a regulating element to the :evaporator 38; the vapour of the refrigerating I medium is again drawn-in by the compressor by means ofthe pipe 3?. The driving motor 38 of the compressor has a vertically arranged shaft and drives the compressor by way of the belt drive 39, as, 43!. The pulley M is designed as a fan; This fan and the fan 42, arranged on the shaft of the drivingmotor, impel a current of cooling air which enters through the openings to of'the covering hood 38, is directed by the .fans over the heat-emanating surfaces of the I motor 38. and .the compressor 3i", and after having absorbed the condensed heat escapes through the upper openings 69 of the hood,

The shaft of the compressor motor passes through the cover d1 of the cooling room insulation and at its lower end carries the fan 63, serving for circulating the cooling room air. In the present case, similar to that shown in Figures 2 and 3, an ice tray 46 combined with a slide 65, serves for preventing circulation of the cooling room air during ice production.

What Iclaim is: 1. A refrigerating arrangement having a thermicaliy insulated cooling chamber subdivided on thebottom of said hood.

- and said slide allowing the air to pass below the wall parting said two compartments and a closure member'for selectively covering and uncovering one of said openings.

2. A refrigerating. arrangement a? thernriically hisnlated-cociingrchamber', a heat absorbing element in said chamber, a hood enclosing said element was to form a compartment for ice production, said hood having an air inlet in its top portiozrand an air-outlet a fan arranged in said.

in its bottom portion, chamber for circulating the air in saidchamher, a motor for actuating said fan arranged outside of said chamber and having a shaft connected with said fan through the heat insulating wall of said chamber, and an ice tray device designed to cover said air outlet when placed 8ft 3. A refrigerating arrangement having a thermically insulated cooling chamber, a heat absorbing element in said chamber, a hood enclosing said element so as to form a compartment for ice production, said hood having an air inlet in its top portion and an air outlet in its bottom portion, a fan arranged in. said chamber for circulating the air in said chamber, a motor for actuating said fan arranged outside of said chamher and having a shaft connected with said fan through the heat insulating wall of said chamber, a removable slide'designed to be placed on the bottom of said hood so as to. close said air outlet, and an ice tray mounted on said slide so as to leave an interstice between its bottom said tray when said outlet is closed by said slide.

RUDOLF I-HNTZE. 

